- A chord is: a line segment joining 2 points on a circle
- A sector is: a pie shaped portion of a circle
- area: the surface covered by a shape
- Area of a circle =: ∏r²
- Area of a sector=: (angle°/360°)(∏r²)
- Area of a triangle =: 1/2 base x height
- Area of parallelogram=: bh
- Area of trapezoid=: 1/2 h (b1+b2)
- ∏ is the ratio of: the circle's circumference to it's diameter or C/D
- circumference: the perimeter of a circle; distance around the outside of a circle
- Circumference of a circle =: ∏d or 2∏r
- cubic units: the units volume is measured in
- perimeter: distance around the outside of a figure
- square units: the units area is measured in
- surface area: the sum of the areas of all faces in a 3-dimensional figure
- the sum of the measures of the angles on one side of a straight line =: 180°
- volume: the amount of space inside a 3-dimensional figure
- Volume of Cone or Pyramid=: 1/3 area of base x height
- Volume of Prism or Cylinder=: area of base x height